Answer:
human interference
Explanation:
Think of the hybrid lady bug..introduced to control insects on crops.
now they are reproducing rapidly, eating natural ladybugs, and other helpful insects..I haven't seen a red ladybug for years. in nw Illinois..
Human interference generally has the greatest impact on ecosystems, surpassing the effects of migratory animals and predation. Habitat destruction, pollution, introduction of non-native species and diseases, and climate change driven by human activities all contribute to significant ecological changes.
The impact of human interference on ecosystems is often more significant than that of migratory animals or predation alone. Humans have altered landscapes and introduced new challenges for wildlife, such as habitat destruction for urbanization and farming, pollution, and the introduction of non-native species. These activities can lead to declines in population and diversity, particularly for migratory species that rely on specific habitats. In Africa, for instance, migratory birds are greatly affected, with changes in land use and climate impacting their numbers significantly. Moreover, the introduction of diseases and predators by humans can have cascade effects on ecosystems, leading to multiple extinctions. Climate change, largely driven by human activities, further exacerbates these issues by disrupting migration patterns and causing habitat loss.
In certain cases, such as the Four Corners drought and subsequent rise in deer mouse populations leading to a spike in Hantavirus cases in humans, we see direct repercussions of ecosystem changes on human populations. Although migratory animals and predation play roles in ecosystem dynamics, the scale and rapid pace of human impacts typically overshadow these natural processes. It should be noted, however, that ecosystems are complex, and the interplay between different factors can often lead to unexpected outcomes and feedback loops.
mackinzie walks 4 blocks west, then 2 blocks south, then 4 blocks east, and, finally, 1 block south. what is the magnitude of her total displacement (in blocks)?
the magnitude of her total displacement in blocks is 3.
Answer:
3 blocks towards south
Explanation:
Displacement is the shortest distance between the final position and initial position.
Initially mackinzie moves 4 blocks west, then 2 blocks south, the 4 blocks east and then 1 block south. Net displacement in East-west direction = 4 - 4 = 0.
In North South direction, net displacement = 2+1 = 3 blocks towards south
Which circuit is a series circuit ?? plz help
In a series circuit, all of the components are connected in the same 'loop' and the current only has one direction/path it can flow through.
In the first three options, the current has multiple paths it can go through. So these three circuits are parallel and not series.
In the last option, the current only has one path where it can flow through, so that circuit is in series.
So Circuit D is a series circuit.
----------------------------------------
Answer
Circuit D
Answer:the last one
Explanation:in a series circuit, only one current flows through it. i.e it connected by a single wire
Why are “input” and “output” good words to use when discussing systems?
Answer:
To determine how efficient that system is.
Answer:
Because it gives a direct relation that can be used to obtain the efficiency E = Input/output which tell us how the system works, for example, if the efficiency is bigger than one, this means that the system amplifies the input (the output is bigger than the input) while if the efficiency is less than one, the output is smaller than the input.
Where these quantities can be forces, heat, electricity, or anything.
simplifying fractions
30 over 54
Answer:
5/9
Explanation:
First, find a common factor for 30 and 54.
30 and 54 can both be divided by 2.
30 divided by 2 = 15
54 divided by 2 = 27
So, your new fraction is 15/27.
However, don't stop there.
15 and 27 can both be divided by 3 as well.
15 divided by 3 = 5
27 divided by 3 = 9
So, your final answer is 5/9.
I hope this helps! :)
Answer:
5/9
Explanation:
An athlete performing a long jump leaves the ground at a 27.0 degree angle and lands 7.80m away. What was the takeoff speed?
Answer:
=9.72 m/s
Explanation:
From the Newton's laws of motion;
x=2(v²cos∅sin∅)/g
Using geometry we see that 2 cos∅sin∅ = sin 2∅
Therefore, x= (v²sin 2∅)g, where v is the take off speed x the range and ∅ the launch angle.
Making v the subject of the formula we obtain the following equation.
v=√{xg /(sin 2∅)}
x=7.80
∅=27.0
v=√{7.8×9.8/sin(27×2)}
v=√94.485
v=9.72 m/s
To find the takeoff speed of an athlete performing a long jump, we can use the principles of projectile motion.
Explanation:To calculate the takeoff speed of an athlete performing a long jump, we can use the principles of projectile motion. Since the jump is treated as a projectile, we can break down the motion into horizontal and vertical components.
First, we need to find the vertical component of the takeoff speed. We know that the jumper leaves the ground at a 27.0 degree angle and lands 7.80m away. The vertical displacement can be calculated using the equation:
Δy = v0y * t - (1/2) * g * t^2
The horizontal component of the takeoff speed can be found using the equation:
Δx = v0x * t
By combining these two equations and solving for the takeoff speed, we can determine the answer.
if 10 calories of energy are added to 2 grams of ice at -30°C, calculate the final temperature of the ice.
Answer:
= -20°C
Explanation:
The specific heat capacity of ice using the cgs system is 0.5cal/g°C
The enthalpy change is calculated as follows
ΔH=MC∅ where M represents mass C represents specific heat and ∅ represents the temperature change.
10cal = 2g×0.5cal/g°C×∅
∅=10cal/(2g×0.5cal/g°C)
∅=10°C
Final temperature= -30°C+ 10°C= -20°C
Answer:
-20 C
Explanation:
A cup of water with holes cut in the bottom will leak because the water is
heavier than the cup.
O A. True
O B. False
Answer:
Salutation
Explanation:
This statement would be incorrect see because water would drip through a cup no matter how heavy because its a liquid and with it having no natural shape it can squeeze through the holes of the cup
The given statement is false.
The water will leak through the holes in bottom not because it is heavier than the cup but because for the reason it is a liquid.
Explanation:
The water is a liquid with a standard viscosity, even with lighter viscosity or heavy viscosity, it will eventually leak out of the cup with the hole in the bottom as the liquid holds the shape of the container unlike solid and thus with hole, leaks out.
A screw incorporates which other simple machine?
lever
wheel and axle
inclined plane
pulley
Answer:
Inclined plane.
Explanation:
Geometrically, a screw is a narrow inclined plane that is wrapped around a cylinder. Like the other simple machines a screw can amplify force; a small rotational force (torque) on the shaft can exert a large axial force on a load.
A screw is a cylinder with a head (solid top) at one end and a pointed tip (like a nail) at the other end.
The mechanical advantage of the screw depends on the space between the threads and the length (and thickness) of the screw. The closer the threads are, the greater the mechanical advantage. It is easier to drive a screw into an object if the thread spacing is smaller.
Answer:
Inclined Plane
Explanation:
A screw incorporates which other simple machine?
lever
wheel and axle
inclined plane
pulley
Which of the following are forms of phase changes
A. freezing
B. condensation
C. heating
D. exchanging
Answer:
I think it would be exchanging sorry if it's wrong
If a toy has a mass of 1 kg, it has an Earth weight of
Answer:
The answer is 9.8 N
Explanation:
As we know that the weight of an object is the amount of gravitational force acting on the object in an upward direction if the weight is acting is the downward direction.
The formula of weight:
W = Mass x Gravitational force
W = m x g
Given data:
Mass =1 kg
g = 9.8 ms-2
W = 1kg x 9.8 ms-2 = 9.8 kgms-2 ( 1 kgms-2 = N)
SO,
W = 9.8 N
The toy has an earth weight of 9.8 N.
In the equation Q=mcΔT,Q represents
A.) The mass substance being heated
B.) The thermal energy
C.) The specific heat of the substance being heated
D.) Temperature measured in degrees C
Answer:C
Explanation:
The specific heat capacity of the substance
In the equation Q=mcΔT, Q represents the specific heat of the substance being heated.
What is the heat capacity formula?The heat Capacity formula is expressed as the product of mass, specific heat, and change in the temperature which is mathematically given as:Q = mcΔT
Where,
Q = capacity in Joules
m = mass in grams
c = specific heat of an object in J/g °C
ΔT = change in the temperature in °C
The heat capacity problem can be applied to calculate the heat capacity, mass, or temperature difference of any given substance.Heat Capacity is described in Joule per Kelvin (J/K).So, Option C is the answer.
To learn more about the heat capacity formula, refer to: https://brainly.com/question/21843266
#SPJ2
2 FULLS
What is the term given to vectors that don't lie in a straight line but instead
point in different directions?
A. One-dimensional
B. Resultants
C. Two-dimensional
D. Displacements
Answer:
Two vectors not lying in the same line and pointing in different direction
C. Two-dimensional
Explanation:
One-Dimensional vectors will point in a single direction only. There magnitude will simply add up.
In case of opposite directions, both the vectors must be lying on a straight line. There magnitude will be subtracted from each other,
Two dimensional vectors are quantities with magnitude and direction and they are represented by two components, x and y.
So, vectors which are not in a straight line and point in different directions are called Two-dimensional vectors.
Select all that apply
What are some basic resources a family is expected to provide for children?
education
clothes
spending money
food
shelter
vacations
Answer:
education
clothes
food
shelter
Explanation:
Answer:
1. education
2. clothes
3. food
4. shelter
Explanation:
The correct answers are basic needs that children should be provided. However, spending money and vacations are just privileges, not mandatory.
Hope this helps! Please mark brainliest!
Which lists the organs in the correct order as food passes from the mouth to anus?
Answer:
The digestive process:
Mouth
Esophagus
Stomach
Small intestine
Pancreas
Liver
Large intestine
Explanation:
The digestive system is made up of the GI tract or digestive tract—and the liver, pancreas, and gallbladder. The GI tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system.
Final answer:
The correct order of the digestive organs as food passes from the mouth to the anus is mouth, esophagus, stomach, small intestine, large intestine, rectum, and anus. Accessory organs aid digestion but do not directly contact food.
Explanation:
The digestive system includes several major organs through which food travels from the mouth to the anus. To answer both review questions provided, here is the correct sequence of the digestive organs along the gastrointestinal tract, starting with the mouth:
MouthEsophagusStomachSmall IntestineLarge Intestine (also known as the colon)RectumAnusIn addition to these organs directly involved in the passage of food, there are accessory organs such as the salivary glands, pancreas, liver, and gallbladder that play crucial roles in digestion. These accessory organs assist in breaking down food through the secretion of enzymes and other digestive juices, but do not come into direct contact with the food within the GI tract.
Which statement best describes what energy transfer diagrams show?
Energy can change form, but the total amount of energy stays the same.
Every energy transformation results in a reduction of energy
Energy transformations result in fewer types of energy
Each type of energy can change into one other type of energy
Answer:
Energy can change form, but the total amount of energy stays the same.
Explanation:
Energy transformation diagrams shows the different forms of energy which are converted into different forms.
As we know by an example of potential energy to kinetic energy conservation when a block is compressed against the spring then initially total energy is in the form of elastic potential energy of the spring.
When block is released then total potential energy of the block is converted into the kinetic energy of the block.
So here we know that in energy transfer diagram shows the transformation of energy while total energy will always remains conserved.
so here correct answer would be
Energy can change form, but the total amount of energy stays the same.
Answer:
a
Explanation:
Energy can change form, but the total amount of energy stays the same.
what does SI stand for,when referring to a system of measurement
si = system international
Answer:
SI stands for International system of units
Explanation:
The SI system, is used around the world to remove bias and inequality of measured values. This made it possible to achieve unified measurements of quantities anywhere in the world by various conversion process. The seven basic SI units are: kilogram (kg), meter (m), second (s), kelvin (K), ampere (A), mole (mol), and candela (cd).
HEY.. ♥️♥️
PLEASE HELP ME IN SOLVING THIS QUESTION
Let Vb = the velocity of the boat.
Vw = the velocity of the flow of the stream.
X = the distance the boat traveled downstream.
So X = (Vb+Vw)T
After turning, the boat takes t time to get back to the float.
Then x -l = (Vb-Vw)t
and l = Vw * (T+t)
Replacing the equations for their variables you get (Vb+Vw)T-Vw(T+t) = (Vb-Vw)t
Simlify to: Vw = l/T+t = l/2T
Now using the values in the problem:
Vw = 12km / 2 * 60 = 12 km / 2hrs = 6km
The answer is 1. 6 km h^-1
Answer:
Hope it can help you and mark me as a brainlist....
The purpose of the Scientific Method is to eliminate any doubts in your research.
True
False
Answer:
true
Explanation:
you need to eliminate all unreal outcomes
An object at rest requires a force of 15 Newtons to set it into motion
Answer:
The force that required an object to move is greater than friction force. The opposite force for an object in motion is the friction force (assuming that the surface where the object lies is rough as most real objects are). This force is needed to be overcome to set the object to motion.
Explanation:
what is the distance moved by a particle moving along x axis if it starts from x=-7m goes upto x= -12m turns and stops at x=+34m? also calculate the net displacement
Answer: Trajectory=51m
Displacement=41m
Explanation:
Let's begin by stating clear that movement is the change of position of a body at a certain time. So, during this movement, the body will have a trajectory and a displacement, being both different:
The trajectory is the path followed by the body (is a scalar magnitude).
The displacement is the distance in a straight line between the initial and final position (is a vector magnitude).
According to this, in the description of the object placed at x= -7m on a number line and moving some 12m to the left and then to the right, stopping at x=34m; we are talking about the path followed by the object, hence its trajectory. So, 51 m is its trajectory.
But, if we talk about displacement, we have to draw a straight line between the initial position of the object (x=-7m) to its final position (x=+34m).
Now, being this an unidimensional problem, the displacement vector for this object is 41m.
A 26 cm object is 18 cm in front of a plane mirror. A ray of light strikes the object and is reflected off the mirror at a 42-degree angle. What is the angle of reflection? degrees What type of image is formed? What is the size of the image? cm
Answer:
42 degrees, virtual image, same size as the object (26 cm)
Explanation:
The law of reflection states that:
- When a ray of light is incident on a flat surface (such as the plane mirror), the angle of reflection is equal to the angle of incidence
So, since in this case the angle of incidence is 42 degrees, the angle of reflection is also 42 degrees.
Moreover, the image formed by a plane mirror is always:
- Virtual (on the same side as the object)
- The same size as the object
So in this case, since the object's size is 26 cm, the image's size is also 26 cm.
42 degrees
virtual
26 cm
wich factors affect the electrical force between two objects?
Answer:
The strength of the charge and the distance between the two bodies.
Explanation:
According to coulombs law, electrical force is calculated as follows:
F = k (Q1 ×Q2)/ d²
where Q1 and Q2 represents the amount of charge between the two bodies while d is the distance between then.
This means the electrical force is directly proportional to the electrical charge of the bodies and inversely proportional to the square of the distance between them.
Bodies with high amounts charges will have stronger electrical forces between them than bodies with less electrical charges.
Charged bodies near each other will have stronger electrical forces between them than bodies far apart.
A group of organs that work together towards achieving one goal or completing one process is called a(n) ____________.
Answer:
Organ system
Explanation:
A group of organs that work together to perform a certain task
A group of organs that work together towards achieving one goal or completing one process is called an Organ system.
Explanation:
The organ system is the system which consists of the group of organ which has been assembled or grouped together to perform a particular course of action or simply say a task. There are many organ system in a human body.
For example, reproductive system, digestive system, excretory system. Here the reproductive system perform a particular task of reproduction, and so does the digestive system for the digestion and the excretory system for the excretion of waste.
need asap !
a television of mass 15 kg sits on a table the coefficient of static friction between the table and the television is 0.35 what is the minimum applied force that will cause the television to slide?
a. 79 n
b. 38 n
c. 147 n
d. 51 n
D. 51 N. The minimum applied force that will cause the television slide is 51 N.
In order to solve this problem we have to use the force of static friction equation Fs = μs*n, where μs is the coefficient of static friction, and n is the normal force m*g.
With μs = 0.35, and n = 15kg*9.8m/s² = 147 N
Fs = (0.35)(147 N)
Fs = 51.45 N
Fs ≅ 51 N
The answer is D) 51 N
It is possible a tree could fall down, even if no one did anything to it. A. True B. False
Answer: Yes
Explanation: To answer this, consider the natural processes that can cause a tree to fall, such as decay, disease, or adverse weather conditions. Trees can fall due to natural factors like rotting of the roots or trunk, strong winds, or heavy snow. Therefore, it is possible for a tree to fall down without any external force acting on it.
whithin which type of system is neither the total mass nor the total energy conserved ?
a. open
b. connected
c. isolated
d. closed
Answer:
a. open.
Explanation:
Open System:
A system that has external interactions is called an open system. In natural sciences an open system is the one whose border is permeable to both energy and mass. In thermodynamics a closed system, by contrast, is permeable to energy but not to matter.
As there are external interactions, the open system might lose/gain energy as well as matter.
Answer:
closed
Explanation:
When are the displacement and acceleration equal to zero for the motion of a mass on a spring?
OA at maximum displacement
OB at minimum displacement
0
at the equilibrium position
OD
at a displacement of 2x
0
at a displacement of - X
Answer:
Option B is the right answer.
Answer:
The correct answer is C. at the equilibrium position.
Explanation:
Which of the following is most likely to be the best conductor of electricity?
oxygen
chlorine
aluminum
chromium
Answer:
I think its oxygen, a conductor is something that allows heat very easily.
Explanation:
Please mark brainliest and have a great day!
Two springs have different spring constants. How could you identify the spring with the greater spring constant value?
A.It will be shorter than the other.
B.It will be stiffer than the other.
C.It will be wider than the other.
D.It will have more mass than the other.
Answer:
B.It will be stiffer than the other. - I JUST DID THE QUIZ ON PLATO AND IT WAS CORRECT.
Explanation:
Karen is running forward at a speed of 9 m/s. She tosses her sweaty headband backward at a speed of 20 m/s.
The speed of the headband, to the nearest whole number relative to a stationary observer watching Karen
Answer:
The speed of the headband, to the nearest whole number relative to a stationary observer watching Karen, is 11m/s
Explanation:
The velocity of the headband relative to the stationary observer is equal to the velocity of Karen relative to the stationary observer plus the velocity of the headband relative to Karen. Mathematically:
[tex]V_{H} =V_{K}+V_{H/K}[/tex]
Where:
[tex]V_{K}=9m/s [/tex]
[tex]V_{HK}=-20m/s [/tex] (it's negative because it mover backward)
[tex]V_{H} [/tex]: velocity of the headband relative to the stationary observer
Plugging these values
[tex]V_{H} =9m/s-20m/s=-11m/s[/tex]
Speed is simply the magnitude of velocity or its absolute value, that is to say, 11m/s (positive)